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question_answer1) Assertion : We have lost all the direct evidences of origin of lie. Reason : The person responsible to protect the evidences were not skilled. [AIIMS 1998]
question_answer2) Assertion : Ginkgo biloba is a living fossil. Reason : Organism which have persisted and remain unchanged for the past several million years while their relative disappeared. [AIIMS 2000]
question_answer3) Assertion : Leaf butterfly and stick insect show mimicry to dodge their enemies. Reason : Mimicry is a method to acquire body colour blinding with the surroundings. [AIIMS 2003]
question_answer4) Assertion : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits. Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear [AIIMS 2004]
question_answer5) Assertion : Coacervates are belived to be the precursors of life. Reason : Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules [AIIMS 2004]
question_answer6) Assertion : From evolutionary point of view, human gestation period is believed to be shortening. Reason : One major evolutionary trend in humans has been the larger head undergoing relatively faster growth rate in the foetal stage. [AIIMS 2004]
question_answer7) Assertion : Cell like aggregates of complex organic compounds are called coacervates. Reason : Coacervates hand power to grow and divide.
question_answer8) Assertion : Botany deals with the study of plants and zoology deals with the study of animals. Reason: : Biology is the study of living beings.
question_answer9) Assertion : Study of internal structure is called anatomy. Reason : It is useful for phylogentic study.
question_answer10) Assertion : Resolving power is the ability to distinguish between two close points. Reason : Micrococpe reduces resolving power.
question_answer11) Assertion : Ribosomes came to our knowledge after the discovery of electron microscope. Reason : Electron microscope has a high magnification and resolving power.
question_answer12) Assertion : The science of classifiying organisms is called taxonomy. Reason : Systematics and taxonomy have same meaning.
question_answer13) Assertion : Radioactive tracers are used to detect tumors. Reason : Tracers locate such tissues.
question_answer14) Assertion : Food web forms food chains. Reason : Only 10% energy passes to next trophic levels in food chain.
question_answer15) Assertion : Amino acids are interliked by peptide bonds to form amino acids. Reason : The smallest protein is ACTH.
question_answer16) Assertion : Adjacent monosaccharides are held by glycosidic bonds. Reason : Monosaccharides are macromolecules.
question_answer17) Assertion : In ainmals, carbohydrates are mostly translocated as sucrose. Reason : In plants, excess of sugar is stored as starch.
question_answer18) Assertion : Living systems have a high degree of tendency for undergoing entropy. Reason : Living systems are unable to overcome entropy.
question_answer19) Assertion : DNA serves as hereditary material. Reason : DNA functions as blue-print for building and running cellular machiner.
question_answer20) Assertion : Miller used four gases-methane, oxygen, hydrogen and water vapour for formation of simple organic compounds. Reason : He prepared some amino acids in his apparatus.
question_answer21) Assertion : Primitive atmosphere was formed by the lightest atoms. Reason : The primitive atmosphere was reducing in nature.
question_answer22) Assertion : It was cyanobacteria-like organism which in ancient time added oxygen to the atmosphere. Reason : Cyanobacteria was photo-autotrophic.
question_answer23) Asseertion : In the beginning, the developmental stages or embryos of animals are alike. Reason : Ontogeny recapitulates phylogeny.
question_answer24) Assertion : Evolution of man is the example of progressive evolution. Reason : Tapworm is developmed due to retrogressive evolution.
question_answer25) Assertion : Archaeozoic era contains abundant fossils. Reason : The fossils are very few during proterozoic era.
question_answer26) Assertion : Petrified fossils contain hard parts of organisms. Reason : Moulds and casts lack the remains of organisms.
question_answer27) Assertion : Intraspecific struggle occurs between the indviduals of different species. Reason : Lobster culture in aquarium is an example of interspecific struggle.
question_answer28) Assertion : First time Darwin used the phrase "survival of the fittest". Reason : The survival of the fittest is the reuslt of natural selection.
question_answer29) Assertion : Formation of new species is called speciation. Reason : The deme has a common gene pool.
question_answer30) Assertion : Geographic isolation brings about sympatric speciation. Reason : Reproductive isolation brings about allopatric speciation.
question_answer31) Assetion : Mutations cause evolution. Reason : Ancon sheep and hormless cattle are developed by inducing mutation.
question_answer32) Assertion : All primates have a commonancestry. Reason : The most primate was shrew like animals.
question_answer33) Assertion : New world and old world monkeys are alike. Reason : Old world monkeys are closer to man.
question_answer34) Assertion : Homologous organs have common ancestry and similar function. Reason : Analgous organs have unlike origin and dissimilar function.
question_answer35) Assertion : The modern horse evolved during pliocene epoch. Reason : It arose from Pliohippus.
question_answer36) Assertion : Dryopithecus africans is a common ancestor of man and great apes. Reason : It gave rise to Ramapithecus.
question_answer37) Assertion : Cro-magnon man has more intelligence than the man of present time. Reason : He is regarded as most recent ancestor of today's man.
question_answer38) Assertion : Homo habilis was the first tool maker. Reason : He was cave-dweller.
question_answer39) Assertion : Atavism is the reappearance of disappeared ancestral characters. Reason : Third molars and hair on body are examples of atavism.
question_answer40) Assertion : Human ancestors never used their tails and so the tails expressing gene has disappeared in them. Reason : Lamarck?s theory of evolution is popularly called theory continuity of germ plasm. [AIIMS 2005]
question_answer41) Assertion : Comparative biochemistry provides a strong evidence in favour of common ancestry of living beings. Reason : Genetic code is universal. [AIIMS 2005]
question_answer42) Assertion : Darwin?s finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds. Reason : Ancestral seed-eating stock of Darwin?s finches radiated out from South American mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats. [AIIMS 2005]
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